Please can someone suggest a suitable plugin that can perform this task as I can't seem to find anything. All the comparison plugins i'm looking for seem to be affiliate tools. I just simply want the plugin to accept an input and then display the outputs. I need it to accually access the excel spreadsheet though as the calculations are quite complex and I don't wish to build these in a plugin as the ones i've looked at can't cope.
I'd be extremely grateful if anyone could point me in the right direction. Thanks